It will either change from no color to yellow, no signal, or green, signal. On the lower right of Fldigi click the SQL box to turn it on. Remember to Save and Close to save your settings.įinally, the most important settings is your digital squelch. For testing enter something like you're favorite radio activity. Also, in the QTC box, enter a message that is automatically sent with the Message retrieve command. The trigger commands need to match the case of the callsign that is sent. In Fldigi click Configure, Config Dialog, Modem, FSQ. Here are some configuration settings to check. Clicking the MON button will open a monitor window which you can resize to see both Fldigi and the monitor window or if you have 2 screens you can drag the monitor window to the 2nd screen so you can monitor all messages. Under the white window everyone should click FSQ-ON and ACTIVE to participate in the FSQ session. If you direct a message to a valid callsign only that station will receive your message. The name allcall will appear as a valid callsign and if you use allcall the information that you send will appear on everyones window. There is an algorithm that will determine valid amateur radio callsigns. On the right side you will see an added white box where the received stations will appear. You will notice a change in the Fldigi main window. If stations have trouble then we will have to slow it down. We will try to use the fastest mode, FSQ 6. So here are some things to set before you can use this mode, following the link that Greg gave us. After you take checkins I would like to demonstrate some of these capabilities. It's a magical mode that allows stations to chat with each other and the ability to send trigger commands to send messages, files and images. You may also rename the log to suit your particular operations.Looking forward to seeing how this mode works on the repeater. You can elect to disable the logging functions. These logs are located in the fldigi temp folder:Ĭ:\Documents and Settings\\fldigi.files\temp Data is appended to each log as it occurs. The logs are never cleared unless the operator does so using the operating system file handling facilities. These logs are named fsq_heard_log.txt and fsq_audit_log.txt respectively. Simply right click on the panel for a pop menu.įldigi's FSQ also saves a continuous log of all Heard stations, and an Audit log that includes all received data. It can also be requested for auto reply by another FSQ station.Īll FSQ transmissions are designed to be inhibited so long as the software detects a received signal (open squelch).Īny of the text in the Rx Panel or the Monitor Panel can be captured for copy, and saving to a file. Your QTC text can be sent using the "QTC" button on the main dialog. You set the Sounding interval to OFF, 1, 10 or 30 minutes. Other FSQ stations will add you to their Heard list if they detect your Sounding signal. The Sounding signal is a way of announcing your presence on the channel with the smallest possible data stream. The baud rate can be selected on the fsq configuration tab, or by left clicking on the left most entry on the fldigi main dialog status bar.įSQ "Sounding" is a periodic transmission of your call sign followed by a colon. The user can elect no aging, Never or 1, 5, 10, 20, 30, 60, 90, and 120 minutes.įSQ transmissions can occur ar 2, 3, 4.5, or 6 baud. You can elect to have the heard list periodically managed so that older entries are removed or aged. Use the narrower filters for noisy conditions, but remember that filtering will both reduce the image noise and also blur the image.Ĭallsigns that satisfy the parsing requirements will be added to the FSQ heard list. Your choice is NONE, 300, 400 or 500 Hz for the low pass filter 6 dB cutoff frequency. The down converted signal can be filtered to reduce the effect of noise. This is equivalent to an analog receiver that using direct conversion. This is accomplished by mixing a 1500 Hz sine wave with the rx stream. Images are detected by first converting the signal to a base band. Min Hits can be set over the range 3 to 6. The Min Hits adjustment sets the number of consecutive times a spectral line is the maximum before being designated as a detected signal. The filtered spectral lines are then tested for maximum value. The default value for the moving average filter is 3. The moving average filter can be adjusted to average 1 to 4 samples. The moving average filter is the optimum filter for locating a signal transition in the time domain. Each spectral line (or bin) of the FFT is then filtered using a time domain filter called a moving average (boxcar) filter. The filters are achieved using a Fast Fourier Transform. The FSQ decoder is essential a set of single frequency filters spaced by the interval samplerate / symbol_length, 2.93 Hz.
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